[bug #56221] groffer does not support colon-specific values in MANPATH

[anonymous]

URL:
  <https://savannah.gnu.org/bugs/?56221>

                 Summary: groffer does not support colon-specific values in
MANPATH
                 Project: GNU troff
            Submitted by: None
            Submitted on: Fri 26 Apr 2019 05:59:17 AM UTC
                Category: None
                Severity: 3 - Normal
              Item Group: Incorrect behaviour
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any
         Planned Release: None

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Details:

The MANPATH environment variable may be prefixed or suffixed by a bare colon
(:) character or contains a double colon (::). These colon characters have the
meaning to insert respectively before, after or between the man directory list
determined from the content of the man configuration files.

See the description of the MANPATH variable in the manpath man page
<http://man7.org/linux/man-pages/man1/manpath.1.html#ENVIRONMENT> for the
complete reference.

The *groffer* tool does not support these colon-specific values in MANPATH and
ends in error when facing them:

   $ echo $MANPATH
   /usr/share/man/mpich-x86_64:
   $ man -w ls
   /usr/share/man/man1/ls.1.gz
   $ groffer ls
   main_do_fileargs(): ls is neither a file nor a man page; at
/usr/share/groff/1.22.3/groffer/main_subs.pl line 1548.
   groffer: empty input
   $ groffer -v
   groffer 2.2.5 is part of groff version 1.22.3.
   GNU groff and groffer come with ABSOLUTELY NO WARRANTY.
   You may redistribute copies of groff and its subprograms
   under the terms of the GNU General Public License.

Looking in _/usr/share/groff/1.22.3/groffer/man.pl_, the _man_setup()_
function should be adapted maybe to only rely on the output of the *manpath*
command as this command could return the manpath system configuration needed
when MANPATH is prefixed/suffixed by a colon character or contains a double
colon.




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